Engine



A.` REPPE.

ENGINE.'

APPLICATION FILED ocr; 2. 1920.

A. BEPPE.

. ENGINE.

` APPLICATION FILED OCT. 2.#1920. 1,406,896.

Patented Feb. 14, 1922.

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WOTNSS! A. REPPE.

ENGINE. APPLICATION FYLED OCT. 2, 1920.

Patented Feb. 14, 192.2..

4 SHEETS-SHEET 3.

Andrew Beppe INVENTOR ATTORNEY WITNESS A. BEPPE.

Erasme. APPLICATION FILED OCT. 2. 1920.

1,406,896, n Patented Feb.14,1922.

4 SHEETS-SHEET 4.

, Anm.. Beppe WITNESS! PATENT oFFics.

ANDREW OF WINIFRED, MONTANA.

y ENGINE.

Lacasse.

Application filed ctcber 2, 1920.

To all whom t may concer-a Be it known that I, ANDREW Ritrrn, a citizen of the United States, residing atVVinift'red, in the county of Fergus and State of Montana, have invented new and useful Improvements in lEngines7 oi which the iollowing is a specification.

This invention relates to a novel construction of steam engine7 the principal object of the invention being to provide means whereby the steam will `actiirst upon the small end of the piston toniove the piston in one direction and will then pass through the low pressure end and act upon the large end oit' the piston to return the piston to its first position.

'Another object of the invention is to provide means whereby the steam will pass through ports in the piston itself thus acting to keep the steam at a high temperature and reducing the amount of steam necessary l to run the engine.

Another objectr of the invention is to provide simple means for causing the controlling valves to permit the steam to'` act Vupon the heads of the piston to reverse the engine, thus eliminating the usual reversing gears and eccentrics with their cooperating parts.

Still another object of the invention is to provide an auxiliary inlet for the steam for supplying an extra amount ot steam to the high pressure part of the cylinder so as to increase the power of the engine.

This invention also consists in certain other 'features of construction and in the combination and arrangement of the severa parts, to be hereinafter fully described, illust'rated in the accompanying drawings and specifically pointed out in the appended claims.

Tn describing my invention in detail, reterence will be had to the accompanying drawings wherein like characters denote like or corresponding parts throughout the several views, and in which v FigureV 1 Vis a longitudinal sectional view through an engine constructed in accordance with my invention.

Figure 2 is a similar view but taken at rioht angles of Figure 1.

*igure 3 is a section on line 3-3 of Figure 1.

Figure 4 is a section on line 4 4 of Figure 1, with the large end of the piston over the exhaust ports. A

Specification of Letters Patent.

Patented Feb. 14, 1922.

serial No. 414,175.

Figure 5 ure 1.`

Figure 6 is a tace view of the large end ot the piston.

Figure 7 is a view of the main steam controlling valve.

In these views 1 indicates the cylinder which is formed of the high pressure part 2 andthe enlarged low pressure part 3, the two parts being connected together by a flange 4. This fiang'e carries the outlet port 5 and the interior wall of the part 3 is provided with the grooves 6 which are located adjacent the flange and act to permit the eX- haust steam to'pass the large end ot the piston when the same is at the end oi its inner stretch. The part 2 of the cylinder at its Vouter end is provided with a steam inlet 7 which is connected with the boiler land a cylindrical projection 3 extends inwardly from this end of the part 2 of the cylinder to forni a steam chest for the incoming steam. This part 8 is provided with ports 9 adjacent its inner end through which the steam may pass from the chest into the parts 2 of the cylinder. The passage of steam through these ports is controlled by the sleevevalve 10 which surrounds the part 8 1and which is provided with the ports 11 for registering with the ports 9. The piston A is provided with the small head 12, which engages the part 2 of 'the cylinder and with a large head 13 located in the part 3 ot the cylinder, these heads being connected together by the stem 1a which includes the cylindrical extensions 15 and 16 carried by the heads and the spaced curved portions 17 which are hollow to form the passages 18. The outer ends ot these passages extend is a section 0n line 5-5 of Figthrough the head 13 while their inner ends communicate with the interior of the cylindrical part 15 by means of the ports 19. The cylindrical part 16 is provided with the exhaust ports-20 for permitting the exhaust steam to pass from the low pressure end of the cylinder to the space between the two heads from which it will flow through the exhaust ports 5. A sleeve 21 has screw threaded connection with the cylindrical part 15 and this sleeve is provided with the ports 22 which register with the ports 19 which are connected with the inner ends of the passages. The outer end of the sleeve 21 is closed and a packing gland 23 is placed between its inner end and the inner end of sleeve 21 and a like valve works in thev cylindrical part 16, these two valves being connected together by the stem 26. This stem carries the bracket 27 which is located in the space between the two curved partsv 1T and has pivoted thereto the rocking lever which has its ends provided with the notched parts 29 for engaging the adjacent ends of the cylindrical parts 15 and 16 to prevent the steam pressure from moving the valves 2l and 25 until the lever is tripped by the trip device 30 which is located at the junction oit the two parts of the cylinder with each other. This trip device is carried by a stem 3l which entends alongside-of the small part of the cylinder and is slidably attached thereto so that it may be moved to slide the trip device against a. trigger 32, 'fastened to the outer end of the lever 28 for tripping the lever for reversing the engine. Said lever carries a spring 38 orholding it in its tripped position. The piston is mnnected with the sleeve valve 10 by the rods 53, which engage openings formed in ears iflon the sleeve valve and said rods carry the, shock absorbing springs The sleeve valve carries the plunger rods 8G for limitingthe movement of said sleeve valve. The cylinder is provided with a pair ot piston rods 3T which pass through holes 38 formed in longitudinally extending side extensions :'59 iormcd on the part 2 of the cylinder.

These rods pass into the part 3 of the cylin-V der and are connected with the head 13. As only the exhaust steam enters the space hetween the cylinder heads, it is not necessary to have packing glands for these rods. The outer ends or the rods are connected together by the cross head a0.

Steam may be supplied directly to the part 2 of the cylinder through the inlet l1 in order to increase the power of the engine or where it is desired to supply steam continuously to the high pressure end ot the cylinder.

It will thus be seen that the steam entering the high pressure end of the cylinder will act on the small head of the piston and torce the piston outwardly. In this position of the parts the valve 24 will be n a position closing the end of the sleeve while the valve 25 will be in a position with the ports 20runcovered. rlhus the steam at the low pressure end of the piston will flow through the cylindrical part 16 and ports 2O into the space between the heads and through the outlet port 5. ris soon as the piston nears the end of the stroke the lever 28 will he tripped by the device 30 so as to permit'the steam pressure to move the valves 24 and 25 to uncover the ports 22 and close the ports 20 and these valves will be locked in this position by the opposite end of the lever engaging the cylindrical part 15. The steam willY then iow through theports 22 and 19 into the passages 18 to the low pressure end of the cylinder and as the ports 2O are closed by the piston valve 25 the steam will act to return the piston to its starting position. As the piston nears the end of its return stroke the trip device 30 will act upon the opposite end of the lever 28 so that the steam pressure will move the valves 24: and 25'into their first positions with the orts 22 closed and the ports 2O uncovered. .ls will be seen the lever 28 is rocked upon its pivotal point, at the end of each stroke, by the trip device 30 engaging the raised end of said lever so as to depress this raised jend into engagement with the piston and raise the opposite end out of engagement with the piston, thus locking the valves against movement until the lever is again tripped. When the engine is going over center the headl will be directly over the ports or grooves 6 and thus permit the steam at the low pressure end to pass to the exhaust. The movement of the piston will reciprocate the sleeve valve by means of the rods 33 and their springs thus permitting the steam to l'low from the chest to part 2 ot the cylinder when the piston is at the high pressure end of the cylinder.

lVhen the engine is to here'versed the device 30 is moved inwardly by the stem 3l so as to engage the part 32 and thus trip the vlever and permit the steam to act in a reverse manner on the piston heads.

Most of the exhaust steam will escape when the engine is going over center through the'grooves 6. This will reduce back pressure and give the engine more power. This engine will use very little steam thus reducing the consumption of fuel. The piston is preferably lcast in one piece and as the ports are very short and are located within` the piston the steam is kept at a high temperature and there is less condensation, thus giving the engine more power. VThilo engines now in use are supplied with steam :from the boiler twice to every revolution of the crank shalt7 my engine makes a complete revolution with the one supply of steam and this supply of steam is not divided as in most engines but the entire amount acts against one piston head and then the other. If there is any pressure in the exhaust steam located between the piston heads it will act to push the piston in the right direction. By the arrangement of the piston rods the use ofpacking glands' is renderedunnecessary thus reducing expense and giving more power with less friction. As the steam never passes through the same port twice the second port can be larger than .the first and the third port larger than the second. This will reduce hack pressure and less condensation thus giving more power to the engine.

The auxiliary inlet 41 can he used for starting'the engine and it can also be used for giving extra power to the engine. The engine will run with steam going into the high pressure part continuously but one hal-li ont this supply of steam would be used only once, while the other halt would be used twice. Thus thismanner of operation would take more steam and is only intended to be used when the engine is overloaded or ior starting. TWhen steam is continuously supplied to part 2 of the cylinder and the piston has moved to the end of its forward stroke and the valves are moved to uncover the ports 22 and close ports 20, some oi' the steam will pass through the ports and passages into the outer end ofpart 3 of the cylinder so as to lorce the piston rearwardly. The steam in chamber 2 continuing to pass through the ports and channels into part 3 until the trip device permits the steam in part 3 to change the position ol' the valves again so that the steam in part 3 can escape to exhaust while the steam in part 2 will be trapped therein and this with the incoming steam will act on the piston to force the same outwardly again. It will thus be seen that some of the steam will simply pass through the ports and passages and flow to the exhaust, while the valves are changing, without acting on the piston.

The engine is reversed by moving the trip device against the trigger. It can also be reversed by turning the engine over center in the opposite direction from which it was running. same direction it did before being stopped unless it is positively reversed.

What I claim is z- 1. An engine of the class described comprising a cylinder provided with a high pressure part and a low pressure part, a piston in said cylinder having a small head operating in the high pressure part and a large head operating in the low pressure part, said largo head having exhaust passages therein` the small head having inlet ports therein and the piston body having passages leading from the inlet ports through the large head, a pair of valves controlling the exhaust passages and the inlet ports and actuated by the steam pressure, a stem connecting the valves together, a trip mechanism connected with the stem, means for controlling the supply oit steam `to the high pressure end of the cylinder and exhaust means carried by the low pressure part of the cylinder.

2. An engine of the class described com-V prising a cylinder having a high pressure part and a low pressure part, a piston in said cylinder having a small head working in the high pressure part and a large head working in the low pressure part and a stem connecting said ends together, the large head having exhaust passages therein and the small head having inlet ports and the stem rlhe engine will revolve in the having passages leading from the inlet ports through the large head, piston valves for controlling the inlet ports and the exhaust passages and acted upon by the steam pressure, a stem connecting the valves together, a trip lever carried by the stem 'for holding the valves against the steam pressure, a slidable trip device for tripping the lever, means for moving said device to trip the lever at a i different point to reverse the engine, the low pressure end o'f the cylinder carrying ex l haust ports and means :for supplying steam to the high pressure end of the cylinder.

3. An engine of the class described comprising a kcylinder having a highv pressure part and a low pressure part, the low pressure part having an exhaust port therein, a piston in the cylinder provided with a small head working in the high pressure part and a large head working in the low pressure part, said heads having inwardly extending cylindrical parts provided with ports anda stem connecting said heads together, said stem having a passage therein connect-ing the ports in the cylindrical part ofthe small head with the outer tace of the large head, piston valves working in said cylindrical parts and acted upon by the steam pressure to cover and uncover the ports in said cylin drical parts, a stem connecting said valves together, a trip lever carried 'by said stem for holding the valves against pressure, a movable trip device for tripping the lever and means for supplying steam to the high pressure part of the cylinder.

e. An engine of the class described comprising a cylinder having a high pressure part and a low pressure part, the low pressure part having an exhaust port, a piston in said cylinder having a small head working in the high pressure part and a large head working in the low pressure part, said piston having passages for connecting the high pressure part with the low pressure part and the low pressure part with the exhaust, valves for controlling said passages and acted upon by the steam pressure, a stem connecting said valves together, a trip mechanisin 'for holding the valves against the pressure and means for supplying steam to the high pressure part, said means including a sleeve valve and means for actuating the same by the piston.

5. An engine of the class described comprising a cylinder having a high pressure part and a low pressure part, the low pressure part having an exhaust port therein and grooves in its walls adjacent said port, a piston provided with a small head workingr in the high pressure part and a large head working in the low pressure part, said large head passing over the grooves when the engine is on center, said piston having passages connecting the high pressure part with the low pressure part and other passages connecting the low pressure part with the exhaust, piston valves for controlling said passages and acted upon by the steam pressure, a stem connecting said valves together, trip mechanism for holding the valves against the pressure and means for supplying steam to the high pressure part.

(3.'An engine oi the class described comprising a cylinder having a high pressure partV and a low pessure part havingl an outlet port, a piston in said cylinder provided with a small head Working in the high pressure part and a large head working in the loiv pressure part, said piston having passages for connecting the high pressure part with the low pressure part and other pas-- sages connecting the lov.7 pressure part with the exhaust, piston valves :for connecting said passages and acted upon by the steam pressure, a stem connecting said valves together, a trip mechanism connected with the stem for holding the valves against the steam pressure, means for introducing steam into the high pressure part and a pair of piston rods passing into the exhaust side of the, low

pressure Vpart and connected with the large head of the piston.

7. An engine oit the class described eemprising a cylinder having a: high pressure part and a low pressure part, the low pressure part having an exhaust port, a piston in said cylinder provided with a small head working in the high pressure part and a large head 'Working in the low pressure part, passages in said piston connecting the high pressure part with the low pressure part and other passages connecting the 10W pressure part with the exhaust, valves for controlling said passages and acted upon by vthestearn pressure, a stein connecting said valves together, a, trip meehanismconneeted with the stem for holding the valves against the steam pressure, valve controlled means orintroducing steam into the'high pressure part, means for actuating` such means by the movement ol the piston and an auxiliary steam supply connected with the high pressure part.

In testimony whereof I aflix my signataire,

' ANDREV BEPPE. 

